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Proceedings Paper

Laser beam self-channeling in photorefractive waveguides
Author(s): Erik Raita; Alexei A. Kamshilin; A. V. Khomenko
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Paper Abstract

The self-channeling of a laser beam in Bi12TiO20 waveguide-like crystals has been studied both experimentally and theoretically. Total internal reflections of strong fanning beams and their coupling with the pump beam result in the light intensity redistribution inside the crystal and in the generation of the photorefractive surface wave. A theoretical model of the intensity redistribution is presented considering the light energy flow from the pump beam to the fanning and backwards after the fanning beam reflection. A numerical simulation f the model shows that the total internal reflection off the side surface, towards which the light energy flow is directed, is responsible for the light energy self-channeling. Anomalously fast photorefractive response as well as its acceleration with increasing amplitude of electric field applied to the sample were experimentally demonstrated.

Paper Details

Date Published: 27 December 1996
PDF: 6 pages
Proc. SPIE 2969, Second International Conference on Optical Information Processing, (27 December 1996); doi: 10.1117/12.262598
Show Author Affiliations
Erik Raita, Univ. of Joensuu (Finland)
Alexei A. Kamshilin, Univ. of Joensuu (Finland)
A. V. Khomenko, Centro de Investigacion Cientifica y de Educacion Superior de Ensenada (Mexico)


Published in SPIE Proceedings Vol. 2969:
Second International Conference on Optical Information Processing

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